power of FPGAS on reset

I have a PCI-7833R. The FPGA is programmed so that it would provide two digital high constantly.  We had a power outage and the FPGA was forced to power down.  When I turn on the power, the FPGA provided is no longer the digital high two.  I have the following questions:

-It seems to me that the FPGA VI did not at all after power off.  The FPGA should not always run?

-For example, I have a new FPGA, and I run an application with bit, VI and VI FPGA host files.  After that, I let the FPGA headlessly tracks.  I guess that the FPGA has taken on the personality of the bit file of the application that I ran before.  If this is the case, what part of the application he associated the file bit for the FPGA?

-If I don't have in my LabVIEW FPGA module and I get a bit of my colleague file, how can I associate the file bit my FPGA and FPGA works headlessly?

-After what a FPGA is configured with the personality of a bit file, what are all the means to clear that or corrupt that?

-If I have an FPGA that is running headlessly, and I want to do a reset, so that the FPGA runs again from the beginning.  Is power cycle an option for this?  Are there other options?  Can I reset an FPGA without power cycling it?

Thank you!

jyang72211 wrote:

-It seems to me that the FPGA VI did not at all after power off.  The FPGA should not always run?

N ° the FPGA loses its configuration when it loses its power and must be recharged again.  In most of the FPGA systems (not just NO), this is done by keeping a copy of the configuration in an EEPROM or similar and load at startup.  Some FPGA OR cards allow you to download a bitfile to flash memory built-in so that it will be loaded at startup, see downloading an FPGA VI to the Flash of a target FPGA.

jyang72211 wrote:

-For example, I have a new FPGA, and I run an application with bit, VI and VI FPGA host files.  After that, I let the FPGA headlessly tracks.  I guess that the FPGA has taken on the personality of the bit file of the application that I ran before.  If this is the case, what part of the application he associated the file bit for the FPGA?

I don't know what you're asking here.  Within your program of LabVIEW you specifically load a bitfile on the FPGA and run.  You can also stop the FPGA and load a new bitfile within the same host application - this is useful when you want to perform several tasks without overlapping on the FPGA and there is not enough space to fit all of them in the same design.

jyang72211 wrote:

-If I don't have in my LabVIEW FPGA module and I get a bit of my colleague file, how can I associate the file bit my FPGA and FPGA works headlessly?

See "using LabVIEW FPGA Interface without the FPGA Module".  When you do headlessly, you mean with no applications running at once, LabVIEW or something else?

jyang72211 wrote:

-After what a FPGA is configured with the personality of a bit file, what are all the means to clear that or corrupt that?

-If I have an FPGA that is running headlessly, and I want to do a reset, so that the FPGA runs again from the beginning.  Is power cycle an option for this?  Are there other options?  Can I reset an FPGA without power cycling it?

There is LabVIEW FPGA method nodes to abort and reset the FPGA, so you can write a simple LabVIEW application for this.  I can't say that's the only way, but it's the only one I know.  I don't know of anyway to clear the FPGA without turning off, but the reset method can be close enough.

Tags: NI Software

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